(57) A display device includes a trench, which includes: first and second trench lines
respectively located between neighboring column lines and between neighboring row
lines, wherein the first trench line includes a first side groove in a column direction,
and first and second corner grooves connected between adjacent first side grooves,
forming an isosceles portion protruding to one side in a row direction, having second
and first diagonal directions, respectively, and connected to each other at a first
contact point, wherein the second trench line includes a second side groove in the
row direction, and the first and second corner grooves connected between adjacent
second side grooves, forming an isosceles portion protruding to one side in the column
direction, and connected to each other at a second contact point, wherein the protruding
isosceles portions of the first and second trench lines share the first corner groove.
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